1.

The increasing order of bond order of O_2 , O_2^+ , O_2^- and O_2^(2-) is

Answer»

`O_2^+ , O_2 , O_2^- , O_2^(2-)`
`O_2^(2-) , O_2^- , O_2, O_2`
`O_2, O_2 , O_2^- , O_2^(2-)`
`O_2^(2-) , O_2^- , O_2 , O_2^+`

Solution :In `O_2^(2-)` and `O_2^-`the added extra electron enters the antibonding orbital which decreases the bond ORDER. In `O_2^+` the electron is removed from antibonding orbital which INCREASES the bond order.


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